بررسی ویژگی‌های رویشی و مورفولوژیک دورگ‌‌های صنوبر پده و کبوده در خزانه آزمایشی استان خوزستان

نوع مقاله: مقاله پژوهشی

نویسندگان

1 کارشناس ارشد پژوهش مؤسسه تحقیقات جنگل‌ها و مراتع کشور

2 عضو هیات علمی/ مؤسسه تحقیقات جنگلها و مراتع کشور

3 کارشناس پژوهش جنگل/ مرکز تحقیقات کشاورزی و منابع طبیعی خوزستان

4 عضو هیات علمی/ دانشگاه تربیت مدرس

چکیده

کبوده (Populus alba) به‌دلیل رشد سریع و سازگاری نسبی به شرایط اقلیمی خشک و نیمه‌‌خشک و پده (P.euphratica) به‌سبب تحمل شوری خاک و شرایط اقلیمی گرم و خشک به‌عنوان گونه‌‌های بومی از اهمیت زیادی برخوردارند. به‌منظور ارزیابی ویژگی‌های رویشی و مورفولوژیکی دورگ‌های حاصل از این دو گونه در شرایط اقلیمی خوزستان، تعداد 18 کلن دورگ P.alba x P.euphratica به‌همراه یک کلن دورگ P.euphratica x P.alba و نیز دو کلن کبوده در قالب طرح آزمایشی بلوک‌های کامل تصادفی با سه تکرار و هر تکرار شامل 10 پایه به‌صورت قلمه در ایستگاه تحقیقاتی کوشکک شوشتر خوزستان در بهمن 1388 کشت شدند. اندازه‌‌گیری درصد جوانه‌زنی در ابتدای فصل رویش سال اول و قطر یقه و ارتفاع در پایان فصل رویش سال دوم انجام گردید. در اواسط فصل رویش سال دوم، 30 نمونه برگ به‌طور تصادفی از هر کلن انتخاب و تعداد 9 صفت‌ مورفولوژیکی اندازه‌گیری شد. نتایج تجزیه واریانس نشان داد که به‌جز درصد جوانه‌زنی کلن‌ها، سایر صفت‌ها اختلاف معنی‌داری داشتند. مقایسه میانگین ویژگی‌های رویشی نشان داد که کلن P.euphratica x P.alba44/9 به‌ترتیب با قطر و ارتفاع 6 سانتی‌متر و 75/6 متر، بیشترین و کلن ماده P.alba58/57 با 1/2 سانتی‌متر قطر و 51/2 متر ارتفاع، کمترین رویش را در طی دو سال داشت. همچنین تجزیه به مؤلفه‌های اصلی نشان داد که کلن دورگ P.euphratica x P.alba44/9 به‌علت همبستگی با 9 صفت از 14 صفت مورد بررسی کاملاً از سایر کلن‌ها متمایز بود. لذا این کلن دورگ طی دو سال انجام این مطالعه مناسبترین رقم در شرایط اقلیمی شمال استان خوزستان ارزیابی می‌شود.

کلیدواژه‌ها


عنوان مقاله [English]

Studying the Growth and Morphological Characteristics of Euphrate Poplar and White Poplar Hybrids in Experimental Nursery of Khouzestan Province

نویسندگان [English]

  • Pedram Ghadiripour 1
  • Mohsen Calagari 2
  • Mohammad Hassan Saleheh Shushtari 3
  • Omid Esmailzadeh 4
چکیده [English]

Populus alba because of fast growing and relatively adapting to dry and semi-dry climate conditions and P.euphratica because of salt tolerating are important as native species. Cuttings of 18 clones (P.alba x P.euphratica), a single reciprocal crossed clone (P. euphratica x alba) and 2 other P. alba clones were planted, surveyed under a RCBD with 3 replications each of which including 10 individuals per plot in Kushkak research station during February 2010. Germination percentage (GP), collar diameter (CD) and height (H) were measured early and late 1st growing season, respectively. 9 morphometric characteristics of randomly collected 30 leaf samples were also measured in the middle of the 2nd growing season. ANOVA showed significant differences among all investigated traits except for GP. During the two-year experiment, P.euphratica x P.alba 44/9 with 6.75 m H and 6 cm CD, and P.alba 58/57 with 2.51 m H and 2.1 cm CD had maximum and minimum growth respectively. Furthermore, PCA showed P.euphratica x P.alba 44/9 was completely different from other hybrids because of correlating with 9 out of 14 investigated traits, therefore P.euphratica x P.alba 44/9 was evaluated the best poplar hybrid during the two-year study in climatic conditions of north of Khouzestan province.

کلیدواژه‌ها [English]

  • growth traits
  • hybrid
  • Khuzestan
  • morphological traits
  • P. alba
  • P. euphratica
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